Method of producing cardboard receptacles.



FFC..

ARTHUR WILLIAM STEVENSON, 0F MANCHESTER, ENGLAND.

METHOD OF PROD'UCING CARDBOARD RECEPTACLES.

To all whom it may concern.'

Be it known that I, ARTHUR VILLIAM S'rnvENsoN, a subject of His Majesty the King of Great Britain and Ireland, residing at Manchester, England, have invented a new and useful Improved Method 0f Producing Cardboard Receptacles, of which the following is a specification.

This invention relates to an improved method of producing receptacles of cardboard or the like.

The object is to produce receptacles of the class hereinafter referred to more cheaply and speedily than heretofore possible with a resultant article of manufacture of an improved form.

According to this invention it is proposed to employ a blank free from projecting portions having slits at certain points therein. Adhesive is applied about said slits and the blank is then forced into a heated die s0 that the edges thereof are turned up to form the sides of the receptacle the slit portions overlapping to form double thicknesses or corners and being at the same time securedy together by the adhesive and pressure and molded so that a finished article is produced in a single operation.

According to one method of carrying out the invention a blank of cardboard or the like having rounded corners is yfirst obtained and this blank is then slit at say four points from the edge a certain Adistance inward, such slits being radial to a center or centers, and being located on lines which may subsequently form the centers of the rounded angle of the finished basket. The face of the cardboard which is to form the inside of the basket may then in one form have glue applied to it at four points which vare bounded on one side by an edge of each slit and the back is similarly glued yat four points which are similarly bounded by an edge of each slit but which occupy points on either side of the material which are not opposite to one another. Or the glue may be put on entirely inside or entirely outside. The glue may be allowed to dry before it is brought into use as hereinafter described. The blank so prepared is placed in a heated die of suitable shape the operator preferably placing same so as to insure that the glued portions will fall into their correct position outside or inside the unglued parts Specification of Letters Patent.

Patented Apr. 18, 1916.

AApplication filed August 13, 1914. Serial No. 856,568.

as the case may be. A plunger is then brought down upon the blank causing the parts separated by the slits to pass one behind the other and so follow the lines of the sides of the die and plunger which may be `of a tapered round cornered shape. As the glued parts come finally together into position the heat softens same and the glued portions under the pressure adhere to the unglued portions. Thus the basket or the like is molded to shape and simultaneously fastened up or secured at a singleoperation and in a single die. The corners of the basket thus overlap giving increased strength but owing to the pressure such parts are compressed so that'the thickness at these points is less than that of two ordinary thicknesses of the material.

yThe molding operation contemplated by the present invention is a true molding, as opposed to a mere turning'up action which has heretofore been employed in certain automatic receptacleA making machines. In the method according to the present invention the depth of the box or article is not `governed by the depth or length of the slits owing tothe true molding action of the plunger and heated mold. It is possible to employ blanks having V shaped slots therein instead of slits in carrying out the present invention.

The dies may be arranged to form a molded outstanding edge so that a shoulder is left inside the basket all or a part of the way around same which shoulder may receive and support a cover plate of cardboard or other material, which may be dropped onto same, or will form outside a rim or bead useful as an abutment for string when an external sheet of paper is to be employed as a cover. The molded rim strengthens the receptacle and improves its appearance. In molding same a plain portion may be left say centrally at each side edge which will give a suitable surface for attaching a handle. This latter may be of metal and of a known form secured by rivets to swivel and nest in the bottom of the basket or be turned'outwardly for use.

The basket may be suitably perforated for ventilation or other purposes and be formed of cardboard or the like waterproofed if desired and lined with another paper, which for some purposes and underkFigure 1 is a plan viewof the blank employed'for forming a receptacle according to one form of the invention. Fig. 2 is a similar view showing the blank with its edges slightlybent up vfor insertion in the die or mold. Fig. Bris a perspective view of one form of I receptacle formed from the .blankshown in Figs. 1 and 2, andvFig. 4 is a similar view showing the receptacle with an additional strengthening rim applied thereto. y Referring to Figs. 1 and 2, the cardboard or like blank 1 has its corners rounded and` a radial slit 2 is formed at each corner. An adhesivesuch as glue is applied to the edges of the slit corners as indicated at Band the yblank is then slightly bent'at its sides causing the slit corners to overlap as sho-wn in Fig. 2 and placed in a suitable die or mold. A suitable plunger then presses the blank in the-mold'preferably under the action of heat and the blank is molded and Dressed into the form shown in Fig. 3, the slit cornersV overlapping and forming a double thickness at the corners of the receptacle as clearly shown. The'heat softens the vglue or other adhesive at the corners of the blank and the pressure causes the overlapped corners to bindk firmly. The die is preferably designed to form a molded shoulder or rim yi around the receptacle, saidrim providing an internal ledge and an external shoulder which-is useful if. a paper or like cover is to be dropped therein or is to be placed over the receptacle to be secured by string.

The glue or other adhesive may be applied wholly on the inside of the portions a of the blank as shown or it may be applied on the outside-or back of the portions b. or partly on each of the portions a and b. It is Ydesirf vable that the adhesive should cover the vwhole handle 5 pi'votally attached tothe inside ofy the receptacle and adapted to turn down and nestv withinsame. At the points of. attachment -of the handle the die is vpreferably shaped to form inwardly proj ecting portions or pivot points Gso that the handle may be turned easily into the nesting position. Or any suitableV form of handle pivoted orV otherwise may be provided. The receptacle shown'in Fig. 4L is provided witha strengthlLfopies of this patent may be obtained for vthicknesses of material.

ening rim or edge 7 which may be applied by a suitable molding operation or 'by hand as desired.

It will be understood that by employing blanks of various shapes andpositioning slits at various points thereiny receptacles of various shapes may be made according to the methods hereinbefore described. Round or circular receptacles for example lmay be formed, the slitsbeing provided at suitable points in a suitably shaped blank.

Various materials other `than cardboard may also be employed.

`What I claiml is 1. The method of producing a receptacle of cardboard or the likeconsisting in slit-y ting a cardboard or like blank which is free fromprojections at points about its corners, and applying an adhesive such as glue at *such points, then under the action of heat moldin'g and pressing said blank. in such a' manner that the edges are turned andthe slit portions thereof caused to overlap rand to be secured to form the sides and corners of the receptacle, the arrangement being such thatthe corners and theadjacent portions on each side ,thereof are composed of double 2. The method of producing afreceptacle :of cardboard or the like consisting'in slitting a cardboard which is free from projections at points about its corners, and'applying an adhesive such asglue at such points, then under the action of heat molding said blank in `such a manner that the edgesy are v"turned and the slitportions thereof causedto overlap and to be secured to form the sides and corners ofthe receptacle a shoulder being also formed on the inside 0f the receptacle extending all the way around same.

3. The method of producing a receptacle. of cardboard or the like consisting in slitting a cardboard which is free from projections at points about its corners, and applying an adhesive such as glue at suchpoints, then under the action of heat molding` said blank" vin such amanner that theedges are turned and the slit portions thereof caused to overlap and to be secured to form the sides and corners of the receptacle a shoulder being. also formed on Athe outside of the receptacle extending part of the way'around same.

In witness whereof I have hereunto set my hand in the presence/of two subscribing witnesses.

n ARTHUR WILLIAM sTEvENsoN.l

Witnesses: l y v i ERNEST CONN, ALICE Borriivo.

Washington, D. C, 1 d 

